Kudos diapers are the first and only natural disposable diapers on the market with a 100% soft, breathable, friction-reducing cotton liner. In fact, plastic never touches your baby's bum while wearing Kudos. Most traditional diapers (even the most natural ones), have diaper liners that are at least 70%, if not (more frequently) 100% plastic. Cotton, on the other hand, is soft, hypoallergenic, and clinically proven to be non-irritating on skin. Want to know more about how we tested this?